I recently bought a new LG 2.1 300w sound bar, not realizing that my Emerson tv does not have an optical output. But my tv does have multiple HDMI outputs. This particular sound bar only has two methods of audio output: optical and auxiliary. I plugged in a normal auxiliary cord but I feel as if I'm not going to get the best out of this nice sound bar by only using an aux cord. My question is; is it worth it to buy an optical to HDMI converter or is simply just using the aux cord enough? Would there be a noticeable difference in sound?